Re: [BUG] RTL8821CS panic on entering power-save mode

[Ping-Ke Shih <pkshih@realtek.com>]

On Fri, 2024-03-15 at 22:30 +1300, Ryan Walklin wrote:
> 
> On Wed, 13 Mar 2024, at 7:05 PM, Ping-Ke Shih wrote:
> 
> > Try module parameter rtw_disable_lps_deep_mode=1 to see if it works well.
> 
> Adding 'options rtw88_core disable_lps_deep=1' did help significantly, and bluetooth connections
> now seem stable. I still get a lot of
> 
> [  267.074209] rtw_8821cs mmc2:0001:1: timed out to flush queue 1
> 
> (1-2 per second every few seconds) in dmesg, particularly during downloads over wifi.

This is because it is trying to enter PS mode but TX queue is still not empty.
If power consumption is not big deal to you, try to turn off PS by
    iw wlan0 set power_save off

I think messages can be disappear. 

> 
> > The IO of SDIO is slower than PCIE, so maybe we can try to enlarge timeout time
> > in rtw_power_mode_change():
> 
> This didn't make any change without disabling the power-saving modes, I also tried increasing some
> of the other timeouts without an effect.
> 

No idea for now. SDIO looks much different from PCIE.